/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hive.ql.util;

import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.ForkJoinWorkerThread;

/**
 * This class allows specifying a prefix for ForkJoinPool thread names.
 */
public class NamedForkJoinWorkerThreadFactory implements ForkJoinPool.ForkJoinWorkerThreadFactory {

  NamedForkJoinWorkerThreadFactory(String namePrefix) {
    this.namePrefix = namePrefix;
  }

  private final String namePrefix;

  @Override
  public ForkJoinWorkerThread newThread(ForkJoinPool pool) {
    ForkJoinWorkerThread worker = ForkJoinPool.defaultForkJoinWorkerThreadFactory.newThread(pool);
    worker.setName(namePrefix + worker.getName());
    return worker;
  }
}
